Image Display Device, Storage Device, Image Display System and Network Setup Method

1. An image display device which can be connected to a network, comprising: a network connection unit performing communication through the network; a USB connection unit to which a USB memory can be connected; a detection unit detecting types of available networks when the USB memory is connected to the USB connection unit; a writing unit writing setup information necessary for setup of communication with the image display device through the network in the USB memory connected to the USB connection unit so as to be readable from another device which is different from the image display device, the writing unit writing the setup information corresponding to a type of network to be preferentially used based on a detection result by the detection unit; and a display unit displaying images by receiving given image data from the another device which is allowed to perform communication through the network by reading the setup information and performing setup concerning the network when the USB memory removed from the image display device is connected to the another device after the setup information is written.

2. The image display device according to claim 1 , further comprising: a determination unit determining whether the connected USB memory is a dedicated storage medium in which setup information concerning the network is written, and wherein the writing unit writes the setup information when the determination unit determines that the connected USB memory is the dedicated storage medium.

3. The image display device according to claim 2 , wherein the determination unit makes the determination based on a folder configuration or a file configuration stored in a storage area included in the USB memory or identification information stored in the USB memory.

4. The image display device according to claim 2 , further comprising: a program writing unit writing a program in the USB memory when the USB memory does not include a program for reading the setup information by the another device from the USB memory.

5. The image display device according to claim 3 , wherein the program writing unit is a unit writing the program so as to be automatically executed when the USB memory is connected to the another display device.

6. The image display device according to claim 1 , wherein a wireless-LAN type and a wired-LAN type are included in the types of networks.

7. The image display device according to claim 6 , wherein, when the image display device includes setup information concerning the wireless LAN and the wired LAN, the writing unit writes both setup information in the USB memory.

8. The image display device according to claim 1 , wherein the image display device is a network-type projector, and wherein the display unit is a unit projecting images on a given projection screen.

9. A USB memory connected to a USB which is a general-purpose data bus, comprising: a unit storing setup information in a prescribed area, which is necessary for setup of communication with an image display device through a network, when connected to the image display device connected to the network and performing image display, the setup information corresponding to a type of network to be preferentially used based on a detection result by a detection unit of the image display device, the detection result being obtained by detecting types of available networks when the USB memory is connected to a USB connection unit of the image display device; a unit automatically starting a first program stored in advance when connected to another device which makes the image display device display images; and a unit executing a second program in the another device, which makes the image display device display images from the another device, after performing setup concerning the network in the another device so that the another device can be connected to the image display device by using the setup information stored in the storage area by the first program.

10. The USB memory according to claim 9 , wherein the first program includes a program of determining whether the second program is installed in the another device, and when the second program is not installed, allowing the another device to carry out functions of executing installation of the second program and starting the installed second program.

11. An image display system, comprising: an image display device connected to a network; another device which is different from the image display device; and a USB memory including prescribed identification information, and wherein the image display device includes: a network connection unit connecting to the network so that communication is possible, a USB connection unit to which the USB memory is connected so as to be detachable, a detection unit detecting types of available networks when the USB memory is connected to the USB connection unit, a writing unit writing setup information which is necessary for setup of communication with the image display device through the network when it is determined that the USB memory connected to the USB connection unit has the prescribed identification information, the writing unit writing the setup information corresponding to a type of network to be preferentially used based on a detection result by the detection unit, and a display unit displaying images by receiving given image data from the another device, and wherein the another device includes: a general-purpose USB connection unit to which a general-purpose USB memory can be connected, a network setup unit performing setup for enabling communication with the image display device through the network by using the setup information stored in the USB memory when the USB memory in which the setup information is written is connected to the general-purpose USB connection unit, and a transmission unit transmitting the given image data to the image display device through the network the setup of which is performed.

12. The image display system according to claim 11 , wherein the USB memory includes a unit executing a prescribed program in the another device when the USB memory is connected to the another device, determining whether there exists a program realizing the network setup unit in the another device and installing the program from the USB memory so as to be executed in the another device when there does not exist the program.

13. The image display system according to claim 11 or 12 , wherein the transmission unit in the another device captures an image displayed on a display unit included in the another device at a predetermined interval and transmits the captured images to the image display device.

14. A network setup method performing setup of communication between an image display device connected to a network and another device which is different from the image display device, comprising the steps of: connecting a USB memory having prescribed identification information to a USB port of the image display device; detecting types of available networks when the USB memory is connected to the USB connection unit; storing setup information necessary for setup of communication with the image display device through the network in the USB memory when the USB memory connected to the USB port includes the identification information, the setup information corresponding to a type of network to be preferentially used based on a detection result by the detection unit; and performing setup processing to enable communication between the another device and the image display device through the network by performing setup in the another device, which uses the setup information stored in the USB memory when the USB memory storing the setup information is connected to the another device.

15. The network setup method according to claim 14 , further comprising the steps of: determining whether there exists a program performing the setup processing in the another device when the USB memory is connected to the another device; and installing the program in the another device when it is determined that the program does not exist.